Condenser



Dec. 1 1925.

J. F. LINDBERG CONDENSER Filed July 5, 1922 Patented Dec. 1, 1925.

UNITED STATES PATENT OFFICE;

JOI-INT. LINDBERG, OF CHICAGO, ILLINOIS, ASSIGNOR TO RELIANCE DIE ANDSTAMP- ING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

CONDENSER.

Application filed. July 5,

the followingis a full, clear, concise, and

exact description.

My invention relates to those condensers which employ .rotativelyadjustable. sides,

I and, in one aspect, more particularly to such a condenser in which theadjustable. element thereof is provided with'two adjusting mechanisms,one for procuring an approximate or coarse adjustment and. the other afine or finishing. adjustment of the adjustable condenser element.

In another aspect of the invention mechanism is provided by which theadjustable condenser element may be oscillated when being actuated by ashaft turned in a uniform direction. This feature of my invention isconsidered novel whether or not there is another adjusting mechanism forthe adjustable condenser element.

In carryingout both objects of the invention speed decreasing cammechanism intervenes between the adjustable condenser element and anoperating shaft, this mechanism serving to retard the movement of theadjustable condenser element with respect to the speed of the adjustingshaft, although the invention is not to be thus limited, particularlywhere the cam mechanism serves to effect the oscillation of theadjustable condenser element.

I will explain my invention more fully by reference to the accompanyingdrawing in which Fig. 1 is a longitudinal sectional view, partially inelevation, of the preferred embodiment of the invention; Fig. 2 is asectional view on line 2-2 of Fig. 1; Fig. 3 is a sectional view on line3 3 of Fig. 1; and Fig. 1 is a perspective view, somewhat diagrammatic,of co-operating parts of. the cam mechanism, some of these parts beingin spaced apart relation to clarify the illustration.

Like parts are indicated by similar characters of reference throughoutthe different figures.

The condenser illustrated includes two mounting plates 1 and 2 ofinsulating material which are assembled upon threaded 1922. Serial No.572,872.

metallic rods 3 by means of nuts 4, 5,. 6 and 7 These rods are assembledwith the mounting board 8, there being distance preserving sleeves 9that intervene between the nuts 4; and the insulatingplate 1. One of thecondenser elements is composed of a group of metallic leaves .10 throughwhich the rods 3 pass and which are electrically connected. by means ofmetallic washers 11 which are interposed between and metallicallyconnect the contiguous plates 10. The other condenser element iscomposed of. a group of metallic leaves 12, these leaves beingalternated with the leaves of the first group, as illustrated. Thecondenser ele ment 12 is mounted to be adjustable with respect to theother condenser element, the adjustable group being preferably rotatablysupported upon the insulating mounting.

plates 1 and 2.-

The support for the group of leaves 12 which is rotatively mounted inthe plates 1 and 2 is inclusive of a rotatable. sleeve or hollow shaftthatis composed of a metallic section 13 having an enlargement '14journaled inthe plate 2 and a contiguous section 15 of non-conductingmaterial that is rotatively supported in the plate 16 through whichtheshaft. section 15projects. There is a knob 17 upon the'outer end oftheshaft section 15, this knob. being provided with scale marks upon itsperiphery, thisknob being rotatable'in frontof a suitably marked plate18, whereby the extent of rotative movement of the shaft 13, 15 andofthe condenser element carried thereby may readily be determined. Themetallic shaft. section 13 is also journaled upon the plate 1 throughthe intermediation of a second shaft 19 j ournaled within the firstshaft and having its projecting end 20 directly journaled in theplate 1.The; portion ofthis shaft that is within the metallic sectionl3 isitself metallic. The inner shafthas, a section 21 of insulatingmaterial. that is. in threaded connection with the. metallic portion of.this shaft and which continues through the bore of the hollow shaft orsleeve sufiicientlyto project beyond the front of the knob 17, thisprojecting end of the inner shaft being equipped with a knob 22 thatbears suitable scale marks upon its periphery to cooperate with suitablemarking upon the knob 17 in defining the extent of the adjustment of theinner shaft with respect to the hollow shaft.

The leaves 12 are spaced apart by metallic washers 23 and there is a nut2% screwed upon the inner end of the hollow shaft 13 for clamping theleaves and washers and the shaft enlargement 14 together. The nut 24%has an annular channel 25 formed therein. This annular channel receivesthe ends of a forked lever 26, the base end of this lever having a lug27 thereon which enters the slot 28 in another forked lever 29. Thelatter forked lever is journaled upon a stud shaft 30 which is carriedupon the mounting plate 1 and which also serves as a means forconnecting the circuit conductor 31 with the rotatable condenser element12,the parts intervening between the stud 30 and the condenser elementbeing metallic. The inner end of the shaft 19 carries an eccentric discor cam 32 which is received between the sides of the forked lever 29 andwhich serves to oscillate this forked lever upon its shaft 30, theoscillating movement of the lever 29 causing a corresponding oscillatingmovement of the lever 26 through the inter-mediation of the engagementbetween these two levers at 27, 28.

The lever 26 is formed of spring metal, the space between its jaws beingsufficiently reduced to enable the forked sides of the lever to havegripping engagement with the base of the annular channel 25. It will beapparent that the knob 22 upon the shaft 19, while being turned in a uniform direction, will cause the oscillation of the lever 26 and the shaft18 in frictional engagement therewith at 25. This frictional engagementis such that it may be overcome when the knob 17 is turned to turn theshaft 13 to efiect coarse or approximate adjustment, the fineradjustment being effected by turning the knob 22 and the shaft 19, thecam and lever mechanism 32, 29, etc., constituting speed decreasingmechanism that couples the shaft 19 with the adjustable condenserelement.

lVhile the invention is preferably embodied in a construction whichpossesses these two adjustments, the invention is not to be thusrestricted.

While I have herein shown and particularly described the preferredembodiment of my invention I do not wish to be limited to the precisedetails of construction shown as changes may readily be made withoutdeparting from the spirit of my invention, but having thus described myinvention I claim as new and desire to secure by Letters Patent thefollowing 1. A condenser including the two elements thereof; a hollowshaft upon which one of said condenser elements is mounted and itselfmounted to turn whereby the condenser element carried thereby is madeadjustable with respect to the other condenser element; a second shaftwithin the hollow shaft and adapted to turn with respect thereto; andspeed reducing cam and lever mechanism establishing turning connectionbetween the second shaft and the adjustable condenser element.

2. A condenser including the two elements thereof; a hollow shaft uponwhich one of said condenser elements is mounted and itself mounted toturn whereby the condenser element carried thereby is made adjustablewith respect to the other condenser element; a second shaft within thehollow shaft and adapted to turn with respect thereto; and speedmodifying cam and lever mechanism establishing turning connectionbetween the second shaft and the adjustable condenser element.

3. A condenser including the two elements thereof; a hollow shaft uponwhich one of said condenser elements is mounted and itself mounted toturn whereby the condenser element carried thereby is made adjustablewith respect to the other condenser element; a second shaft within thehollow shaft and adapted to turn with respect thereto; and speedreducing oscillating mechanism for oscillating the adjustable condenserelement and establishing oscillating connection between the second shaftand the adjustable condenser element.

1. A condenser including the two elements thereof; a hollow shaft uponwhich one of said condenser elements is mounted and itself mounted toturn whereby the condenser element carried thereby is made adjustablewith respect to the other condenser element; a second shaft within thehollow shaft and adapted to turn with respect thereto; and speedmodifying oscillating mechanism for oscillating the adjustable condenserelement and establish ing oscillating connection between the secondshaft and the adjustable condenser ele ment.

In witness whereof, I hereunto subscribe my name this 21st day of JuneA. D., 1922.

JOHN F. LIN DBERG.

